General Dynamics 500-0646, Operation Manual

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500-0646A 41
3.1.6 Replacing the Elevation Jack Boot
Replacement of the elevation jack boot should only be attempted in winds less than 20
mph. Rotate the antenna to the 90
°
position while placing a wooden block between the
“T-head” and the hub. “Lock” the antenna in place with a come-along, cables or ropes.
Ensure that after removing the jack rod-end pin from the pedestal base, it is still possible
to reconnect the rod end. Remove the rod-end pin at the pedestal and swing the jack
screw downward. Loosen the clamps and remove the boot. (It may be necessary to cut
the old boot to remove it.) Install a new boot over the jack and tighten the clamps to
secure it. (It may be necessary to fold the boot on the end of the rod that connects to the
pedestal base.)
3.1.7 Replacing the Azimuth Jack Boot
Replacement of the jack boot should only be attempted in winds less than 20 mph. Drive
the jack until it is fully extended. “Lock” the antenna in place with a come-along, cables
or ropes. Remove the rod-end pin and the swing-jack screw outward. Loosen the clamps
and the remove boot. (It may be necessary to cut the old boot to remove it.) Install the
new boot over the jack and tighten the clamps to secure it. (It may be necessary to fold
the boot on the end of the rod that connects to pedestal base.)